package backup

import (
	"path/filepath"
	"strings"
	"testing"
	"time"
)

// R-1178 (data-loss hunt 2026-10-20, R5): the second drive's „Teljes visszaállítás" merged files, THEN the unit half
// refused (a cut-off database copy), left the app STOPPED, and said „az alkalmazás és az adatai érintetlenek". Now the
// unit's refusals are asked before the file half: nothing moves, the app is never stopped, and the sentence is true.
// RED-PROOF: without the CheckOnly pre-check in RestoreTier2Whole this fails on „files changed before the refusal"
// (1 restored + 1 replaced, the measured R5 outcome — audits/dataloss-hunt-2026-10-20/C3-R5-whole-restore/).
func TestR1178_AUnitRefusalComesBeforeAnyFileMoves(t *testing.T) {
	cut := strings.Replace(pgDump(1), "PostgreSQL database dump complete", "", 1) // a cut-off copy (R-640)
	f := r102Tier2Fixture(t, []string{"app_data.tar"}, cut)
	f.m.stackProvider = fileAppProvider{f.fake}
	mid := time.Date(2026, 9, 22, 10, 0, 0, 0, time.UTC)
	mirrorLeg := filepath.Join(f.destBase, "hdd", "appdata", "app")
	liveLeg := filepath.Join(f.liveDrive, "appdata", "app")
	writeAt(t, filepath.Join(mirrorLeg, "p1.jpg"), "P1", mid)
	writeAt(t, filepath.Join(mirrorLeg, "p2.jpg"), "P2 mirror NEWER", mid.Add(72*time.Hour))
	writeAt(t, filepath.Join(liveLeg, "p2.jpg"), "P2 live older", mid.Add(48*time.Hour))
	before := fingerprint(t, liveLeg)

	res, err := f.m.RestoreTier2Whole("app")
	if err == nil {
		t.Fatal("a cut-off database copy must refuse the whole restore")
	}
	if res.Files.Restored+res.Files.Replaced != 0 {
		t.Fatalf("files changed before the refusal: %+v", res.Files)
	}
	if after := fingerprint(t, liveLeg); !sameFingerprint(before, after) {
		t.Fatalf("the live files changed: before %v after %v", before, after)
	}
	if f.fake.stopped {
		t.Fatalf("the app was stopped by a restore that refused — calls %v", f.fake.calls)
	}
	if !strings.Contains(err.Error(), "rintetlenek") { // „érintetlenek" — now true
		t.Fatalf("the refusal must keep its „untouched\" sentence (true now), got %v", err)
	}
}

func sameFingerprint(a, b map[string]string) bool {
	if len(a) != len(b) {
		return false
	}
	for k, v := range a {
		if b[k] != v {
			return false
		}
	}
	return true
}